What can I say without spoilers?
This series is actively fighting for "Christmass Special" crowd.
First things first - animation. It's really bad. Both the graphic design and the actual animation looks like something made by untalented fan. If that was the case - I would apploud the effort. But it's Disney production and I can't really understand what drove them to make that atrocious graphic style choice. It's like mistaking simple stuff with simpleton - sounds right about familliar, but actually are oposites.
I would say I'm guilty of watching some poor series with good graphics only because they please me esteticly. True - but I can watch awful animation if the plot is kicking, so how "Forces of Destiny" is doing in this department?
Well... it's not.
The stories are shamefully weak.
Both protagonists and antagonists are poorly writen and developed which leads to unpleasent expirience.
The writers are clearly pushing some agenda - and I wouldn't mind that much, if they would create entertaining show on the way. Well... they didn't. And I had pretty little idea why - they were so preoccupied with telling viewer what to think, to tell them actuall compeling story.
So why a gave 3 stars? Well, the show have some redeeming qualities (hidden really deep), it can throw few interesting nodes into canon, and it can (barely) expand some known (and loved by me) characters.
I would love to see this series rebooted and done right by some competent writers and animators that know what they are doing.
My opinion? Give it a try, maybe Your kids will watch it and won't hold a grudge... but on the other hand - why risk it? Show them "Gravity Falls" or "Star vs. the Forces of Evil", or "Clone Wars", "Rebels"...